Automobile radiator core



March 9 1926.

C. W. OWSTON AUTOMOBILE RADIATOR CORE Filed Oct. 19, 1922 III/I Patented Mar. 9, 1926.

UNITED STATES PATENT OFFICE.

CHARLES WM. OWSTON, OF DETROIT, MICHIGAN, ASSIGNOR, BY MESNE ASSIGN- MENTSfTO MGOOBD RADIATOR & MFG. 00., OF DETROIT, MICHIGAN, A CORPORA- TION OF MAINE.

AUTOMOBILE RADIATOR CORE.

Application filed October 19, 1922. Serial- No. 595,488.

7 '0 all whom it may concern:

Be it known that I, CHARLES WM. Ows'roN, a citizen of the United States, residi at Detroit, in the county of Wayne and tate of Michigan, have invented new and useful Improvements in Automobile Radiator Cores, of which the following is a specification.

This invention relates to automobile radiator cores and more particularly of the fin and tube type.

The object of my invention is to provide the fin strips or plates with a plurality of relatively small projections distributed over the surfaces of said plates to increase the number of points on the plates from which heat may be rapidly radiated, and also to roughen said surfaces in order to increase the turbulence of the air in its passage over the plates and turn the colder air against the heated metal.

The invention consists further in the matters hereinafter described and more particularly set forth in the appended claims.

In the accompanying drawings Fig. 1 is a front view of an automobile radiator having a core of the fin and tube type embodying the features of my inventlon;

Fi 2 is an enlarged fragmentary horizonta sectional view taken on line 2-2 of Fig. 1; v

Fig. 3 is a transverse sectional view taken on line 33 of Fig. 2;

Fig. 4 is an enlarged fragmen longitudinal view taken on line 4-4 of ig. 2;

Fig. 5 is an enlarged sectional view taken through a fin strip or plate to show in detail several of the cone shaped projections thereon; and

Figs. 6 and 7 are views showing modified p forms of strips or plates to be hereinafter described In Fig. 1 of the drawings, I have shown an automobile radiatorhaving a core 1 cmbodying the features of my invention and contained within an outer casing or shell 2, as usual in radiator construction.

The core 1 is of the fin and tube ty e and comprises a plurality of relatively at fin strips or lates 3, 3, preferably made of copper. ese strips or plates, when the core is assembled as in Fig. 1, are horizontally arranged, one above the other, in vertical spaced relation to allow air to pass throug the core from front to rear to cool 2111 water flowing through the vertical tubes To accommodate the tubes 4, the strips or plates 3 are provided with holes or apertures 5, 5. In the particular form of structure shown in the drawings, these tube holes are arranged in rows both transverse and lengthwise of the strips. At the tube holes 5 the strips or plates 3 are provided with integral ferrules 6, which engage about the water tubes 4 and are secured thereto by solder in building the radiator. In the fornrof plate or strip 3 in Figs. 2 to 4, each strip is provided with a plurality of holes 7, 7 arranged across the plate between each row of tubes 4, 4 to permit air to circulate through the strips.

To increase the heat radiating capacity of thecore, each strip or plate 3 is provided with a plurality of projections 8, 8. 'lhese extend outward beyond the plate and are distributed over the entire area of the strip between the tube holes 5 and the air holes 7. Said projections 8 may all extend from one side of the plate or strip, as shown in Figs. 2, 3, and 4, or may project from opposite s1des of the strip or plate, as shown in Fig; 7. These projections 8, 8 are preferably made conical in she. e, as illustrated in detail in Figs. 5 an 7, and are closed at their outer ends or apexes, as shown in these figures.

The rojections 8, 8 are preferably formed by punch pricking or raising the same from one or both axles of the strips as described. The cones 8, 8 in projecting from the flat surface of the strips or plates 3, 3 increase the number of points on the lates from which heat is more rapidly radiated than from fiat surfaces and thus increase the heat radiating capacity of the core. Said rojections 8, 8 also roughen the surface of tile plates 3 and thus increase the turbulence of the air as it flows over said plates and effects turnin of colder air against the heated metal. is increases the e ciency of the core in that it provides for more eflicient and rapid heat dissipation.

Instead of providm the fin strips or plates with ventilating holes 7, 7 as in Figs. 2, 3, and 4, I ma eliminate said holes and have the projections distributed over the entire surface of the plates between the tube holes. This construction is shown in Fight 3 There the fin strip or plate is indicate 9, the tube holes by 10, the tubes in dotted lines by 1 1, and the projections by 8 the same as in the preceding figures. In Fig. 6, the cones 8, 8 all project from one side of the strip or plate, and in Fig. 7 from opposite sides of the strip or plate.

I claim as my invention! 1. A radiator core, having. spaced flat sheet metal heat radiating plates, and water tubes extending throughthe flat portions of the plates and in contact therewith, said plates being provided with a plurality 'of relatively small conical projections forced out from the metal of the plates and distributed .over substantially the entire area thereof and between and about the tubes to roughen the plates and heat radiating points thereon, said projections having their @apexes pointed and closed. Y

-2. A radiator c ore,.having spaced flatsheet metal heat radiating plates, and water tubes extending through the flat portions of the plates and in contact therewith, said lates having air holes between said tubes, said plates being provided with a. plurality of relatively small conical projections forced out from the metal of the plates and distributed over substantially the entire area thereof and between and about the tubes and air holes to roughen the plates and increase the heat radiating points thereon, said projections having their apexes pointed and closed. I

3. A radiator core, having spaced flat sheet metal heat radiating plates, and water tubes extending through the flat portions of increase the contact therewith, said the plates and in plurality of plates being provided with a relatively small conical projections forced out from the metal of the plates on opposite sides thereof and distributed over substanthe plates to roughen tially the entire area of lates on both sides the flat surfaces of the and increase the heat ra iating points thereon, said projections having pointed and closed.

4. A substantially flat sheet metalheat radiating plate for automobile radiator their apexes cores, said plate having holes therein for the passage of water tubes, and a plurality-of conical projections forced out of theimetal of the plate and distributed over substan tially the entire area thereofand about the tube holes to roughen the plate and increase the'heat radiating points thereon, said projections havlng their apexes pointedand closed. r

5. A-radiator core, having substantially flat sheet metal heat radiating plates honwater tubes extend- I in vertically. spaced distributed over substantially the entire 1 area thereof and around and between the tubes to roughen the plates and increase the heat radiating points thereon, said projec tions terminating in points at their apexes.

In testimony that I claim the foregoing as my invention, fourteenth day of October,

CHARLES WM. OWSTON.

I afiix my signature this 

